管程法

管程法

package com.guo.gaoji;


//测试生产者消费者模型-->利用缓冲区解决：管程法

//生产者、消费者、产品、缓冲区

public class TestPC {
    public static void main(String[] args) {

        SynContainer container = new SynContainer();

        new Producter(container).start();
        new Consumer(container).start();

    }
}

//生产者
class Producter extends Thread{
    SynContainer container;

    public Producter(SynContainer container){
        this.container = container;
    }

    //生产
    @Override
    public void run() {
        for (int i = 0; i < 100; i++) {
            container.push(new Chicken(i));
            System.out.println("生产了第-->"+i+"只鸡");
        }
    }
}

//消费者
class Consumer extends Thread{
    SynContainer container;
    public Consumer(SynContainer container){
        this.container = container;
    }

    //消费

    @Override
    public void run() {
        for (int i = 0; i < 100; i++) {
            System.out.println("消费了第-->"+container.pop().id+"只鸡");
        }
    }
}

//产品  鸡
class Chicken{

    int id;

    //构造器
    public Chicken(int id) {
        this.id = id;
    }

}

//缓冲区
class SynContainer{

    //需要一个容器大小
    Chicken[] chickens = new Chicken[10];
    //容器计数器
    int count = 0;

    //生产者放入产品
    public synchronized void push(Chicken chicken){
        //如果容器满了，就需要消费者来消费
         if (count == chickens.length){
             //通知消费者消费，生产者等待
             try {
                 this.wait();
             } catch (InterruptedException e) {
                 throw new RuntimeException(e);
             }
         }

        //如果没有满，我们就要丢入产品
        chickens[count] = chicken;
        count++;

        //可以通知消费者消费了
        this.notifyAll();

    }

    //消费者消费产品
    public synchronized Chicken pop(){
        //
        if (count==0){
            //等待生产者生产，消费者等待
            try {
                this.wait();
            } catch (InterruptedException e) {
                throw new RuntimeException(e);
            }
        }

        //如果可以消费
        count--;
        Chicken chicken = chickens[count];

        //吃完了，通知生产者生产
        this.notifyAll();
        return chicken;

    }

}